Modelo de Aerogenerador de Velocidad Variable DFIG con Control LVRT

 Biennial Congress of Argentina (ARGENCON), 2014 IEEE

Resumen: El rápido crecimiento de la generación de energía eólica trae consigo nuevos requerimientos para la integración de turbinas eólicas a la red.

IEEE

Uno de estos requerimientos es la capacidad “Low Voltage Ride Through” (LVRT) que exige a los aerogeneradores a permanecer conectados durante un hueco de tensión en la red eléctrica para determinadas condiciones y el aporte de corriente reactiva durante el mismo para ayudar a soportar la tensión del sistema, entre otros requisitos.

En este trabajo se presenta un modelo de aerogenerador de inducción doblemente alimentado (DFIG en inglés) con control LVRT que permite realizar análisis de sistemas eléctricos de potencia y verificar que se cumplan los requisitos de un código de red específico. Las simulaciones muestran el funcionamiento del aerogenerador con y sin control LVRT.

Link IEEE: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6868574

Influência dos Parâmetros dos Condutores na Impedância Própria das Fases dos Sistemas Elétricos

Este artigo apresenta uma análise numérica relacionada com a influência dos parâmetros dos condutores na impedância própria das fases de um sistema elétrico de distribuição. Os condutores analisados foram selecionados a partir de famílias de cabos comerciais avaliando-se sua resistência elétrica e o raio médio geométrico. Ambos os parâmetros foram relacionados através de equações apresentadas neste trabalho. Estas equações permitiram o traçado de curvas relacionando a impedância própria das fases das diferentes famílias com a resistência dos cabos, para diferentes tipos de neutros. O trabalho mostra que a impedância própria das fases não depende apenas dos seus condutores senão da combinação de condutores fase-neutro. Deste modo, para um mesmo cabo de fases resultam diferentes impedâncias quando combinado com diferentes neutros. Da mesma forma, uma mesma impedância de fase pode ser obtida com diferentes combinações de cabos.

Palavras chave– Sistema de distribuição de energia elétrica, matriz de impedância, impedância própria de fase.

VER ARTICULO COMPLETO

Very Short‐Term Electric Load Forecasting Considering Climate and Temporal Variable

Por: Gustavo Figueredo Casagrande, Oswaldo Hideo Ando Junior, Mario Orlando Oliveira, Oscar
Eduardo Perrone, José Horacio Reversat
ABSTRACT

The paper has presented a very short‐term electric load forecasting using climate and temporal variables for a thermoelectric power generation, located in Rio Grande do Sul, Brazil. The climatic variables used were wind speed, air temperature and relative humidity combined into a single
value called discomfort index, while the temporal variables consist of two coefficients created from actual values of electricity demand supplied by the thermoelectric power plant company. The projections presented error values of 3.38% and 4.39% for working days and 4.55% and 5.42% in
non‐working days.

International Journal of Automation and Power Engineering (IJAPE), ISSN 2161-5055

Ver as en: http://www.ijape.org//PaperInfo.aspx?ID=14303

Simulation and Analysis of the Radiation Pattern of Microstrip Patch-Type Antenna

Por: S. M. Campo, R. J. Bermudez, F. G. Serna, O. E. Perrone and M. O. Oliveira

ABSTRACT

This paper presents the results of a research project aimed at studying the behavior of the radiation pattern of a patch antenna through computer simulations. In this sense, is present the basic guidelines for design, implementation and preliminary simulation of different antenna prototypes through
an algorithm simulator developed in MATLAB ® environment.

Comparative studies of the simulation values are performed with the software LVDAM-ANT® which relate simulation data with actual experimental values. The results obtained demonstrate the
efficiency of the simulation algorithm developed to underpin the study presented in this paper.

IEEE Latin America Transactions, ISSN 1548-0992

Ver en: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6502827&queryText%3DOliveira%2C+M.+O.

Management of Mechanical Vibration and Temperature in Small Wind Turbines Using Zigbee Wireless Network

Por: A. D. Spacek, O. H. Ando Junior, J. M. Neto, V. L.Coelho, M. O. Oliveira, V. Gruber and L. Schaeffer

ABSTRACT

This paper presents the development of a methodology to manage the mechanic vibration and temperature from Small Wind Turbine (SWT). The objective with this research is propose a new diagnostic and protection tool through analysis and monitoring signals of vibration and temperature from wind turbines, aiming predict a need of preventive maintenance and mostly avoids catastrophic failures. For this feature the system will be composed of a Triple Axis accelerometer who will identify vibration, thermocouples to identify the temperatures at critical points of wind turbine, a microcontroller hardware which will make acquisition and processing of signals from sensors and finally a wireless transmission system using technology ZigBee. The post processing is performed remotely through a computer that receives the data submitted via wireless network presenting them to the user via graphical interface. The software of User friendly interface will have the functionality plus online display of received data also the possibility of storing and reporting data rates of vibration and temperature obtained during monitoring. Finally featuring the prototype of the hardware and software as well as some results
obtained in experimental scale.

IEEE Latin America Transactions, ISSN 1548-0992

Ver en:http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6502854&queryText%3DOliveira%2C+M.+O.

Evaluation of Alternative Disposal and Replacement of Fluorescent Lamps

POR: F. Carlessi, M. O. Oliveira, H. O. Ando Junior, J. M. Neto, A. D. Spacek, V. L. Coelho, L. Schaeffer, H. Bordon, O. E. Perrone, A. S. Bretas

ABSTRACT

This paper presents a evaluation of the disposal alternatives and substitution of the flourescent lights, in order to contribute with the correct recycling of this product. Initially presents a projection of how much eletricity can be saved by changing the most used lamps by the brazilian for LED lamps (Light-emitting diode). After, a economic viability evaluation also is presented in this study. Also a descriptionof the reciclyng methodologies and disposal of the flourescent lamps and the danger who may be caused for health, are presented with the final conclusions of this research.

Renewable Energy and Power Quality Journal (RE&PQJ), ISSN 2172-038X

Ver en: http://www.icrepq.com/RE&PQJ-11-4.html

Viability Study for Use of Rice Husk in Electricity Generation by Biomass

Por: M. O. Oliveira, J. M. Neto, M. C. Inocencio, O. H. Ando Junior, A. S. Bretas and O. E. Perrone

ABSTRACT

This paper presents the main technical and economic issues related to the study of a rice husk small-scale thermal power generation from a Southern Brazilian Rice Processing Cooperative Agriculture. In this study, a case study energy cogeneration associated with rice processing is presented with the estimated cost of operation and maintenance of a small pilot plant. It is also considered the impact of carbon credits sale inflow funds, which can reduce production costs related to electricity consumption. It will be presented also that the possibility of selling carbon credits, increases the project economic viability by 50%, allowing a reduction in the investment return time by 20%

 

Renewable Energy and Power Quality Journal (RE&PQJ), ISSN 2172-038X

Ver en: http://www.icrepq.com/RE&PQJ-10-12.html

Design and Analysis of Brushless Self-Excited Three-Phase Synchronous Generator

Por:  M. O. Oliveira, A. S. Bretas, F. H. García, L. A. Walantus, H. E. Muñoz, O. E. Perrone and J. H. Reversat

ABSTRACT

This paper presents the main features of design, construction, performance analyses and experimental studies of a brushless self-excited three-phase synchronous generator. The basic construction, principle of operation, and exciting characteristics are described. In proposed machine the rotor winding is shorted through diodes and the self-excitation is reached by a slip between rotor and stator winding built with different pole numbers. Computer simulations performed with MATLAB® software were used to verify the mathematical model of the brushless self-excited synchronous generator and the achieved results showed similar behavior with experimental values.

Renewable Energy and Power Quality Journal (RE&PQJ), ISSN 2172-038X

Ver en : http://www.icrepq.com/RE&PQJ-10-12.html

Characterization of Losses at the Distribution System

Por: Álvaro Coelho Bratti, Oswaldo Hideo Ando Junior, João Mota Neto, Anderson Diogo Spacek, Vilson Luiz Coelho, André Abelardo Tavares, Mario Orlando Oliveira

ABSTRACT

This paper shows the importance of the control and the mitigation of technical and non‐technical losses at electric energy distribution systems. For the classification and segmentation of such losses, the calculation methodology from the National Agency of Electric Energy (ANEEL) has been employed, presented at the seventh module of the Proceedings of Electric Energy Distribution at the National
Electric System (PRODIST). As for the application of the exposed methodology, a case study was conducted on the distributor CERSUL, which had not developed a study about losses classification before. It was possible to identify the frailty of the methodology when applied to small systems or
small size companies, since the results of the technical losses are different from the ones suggested by the bibliographical reference and the ones obtained during the measurements.

International Journal of Automation and Power Engineering (IJAPE), ISSN 2161-5055

Ver en: http://www.ijape.org/paperInfo.aspx?ID=9762

Study to Distributed Generation Deployment Using Photovoltaic System Connected in a Grid Residencial Consumer

Por: Oswaldo Hideo Ando Junior, Ricardo Macan, João Mota Neto, Mario Orlando Oliveira, Jose Horacio Reversat, Roberto Chouhy Leborgne

ABSTRACT

This paper presents a study on Photovoltaic System (PVS) and implementation on the electric network in a residential consumer.
In this sense, the rules and regulations for this type of Distributed Generation (DG) are presented. For this application two possible solutions are selected, the first with a PV system connected to the
network with 18 photovoltaic modules monocrystalline silicon, providing a power of 245 Wcc, and the second solution formed for a PVS connected to the network with 15 photovoltaic modules of 290 Wcc. The proposed solution validation is carried out using the simulation software System Advisor Model (SAM). Finally, the analyses results of possible solutions for the deployment of photovoltaic system are presented.

International Journal of Automation and Power Engineering (IJAPE), ISSN 2161-5055

Ver en: http://www.ijape.org/paperInfo.aspx?ID=9762